import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
@WebServlet("/loginOut")
public class loginOutServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取会话，查询登录状态
        HttpSession session=req.getSession();
        if (session==null){
            resp.sendRedirect("login.html");
            resp.setStatus(403);
            return;
        }
        session.removeAttribute("user");
//        不重定向会直接进入空白页
        resp.sendRedirect("login.html");
        resp.setStatus(200);
    }
}
